Quote Originally Posted by GTslOw
the tuning tool u are talking about is several little rods that u tap against each other in front of the radar and the vibration will show a speed on the radar. each set of rods will show a certain speed as marked on the bag they are in
they are tuning forks i have used them when i use to work on park ranger cars at goodyear. they are just like tuning forks for guitars.